import { OVar, e } from "../jshelper/mod.ts";



document.addEventListener("DOMContentLoaded", () => {
    if (document.body.classList.contains("player")) {
        const node_id = globalThis.location.pathname.split("/")[2];
        const main = document.getElementById("main")!;
        initialize_player(main, node_id)
    }
})

function initialize_player(el: HTMLElement, node_id: string) {
    el.innerHTML = "" // clear the body

    const buffering_state = new OVar(true)
    const playing_state = new OVar(false)
    const current_time = new OVar(0)
    const remaining_time = new OVar(0)

    const vel = e("video")
    vel.src = `/n/${node_id}/stream?tracks=1&tracks=0&format=matroska&webm=true`

    const toggle_playing = () => vel.paused ? vel.play() : vel.pause()


    let pri_current: HTMLElement;
    let pri: HTMLElement;
    const controls = e("div", { class: "jsp-controls" },
        playing_state.map(playing => e("button", playing ? "||" : "|>", { onclick: toggle_playing })),
        e("p", { class: "jsp-status" },
            current_time.map(v => e("span", display_time(v))), e("br"),
            remaining_time.map(v => e("span", display_time(v)))
        ),
        pri = e("div", { class: "jsp-pri" }, pri_current = e("div", { class: "jsp-pri-current" })),
        e("button", "X", {
            onclick() {
                if (document.fullscreenElement) document.exitFullscreen()
                else document.documentElement.requestFullscreen()
            }
        })
    )


    vel.onloadedmetadata = () => {

    }
    vel.ondurationchange = () => {

    }
    vel.ontimeupdate = () => {
        remaining_time.value = vel.currentTime - vel.duration;
        current_time.value = vel.currentTime
        pri_current.style.width = (vel.currentTime / vel.duration * 100) + "%"
    }
    vel.onplay = () => {
        buffering_state.value = false;
    }
    vel.onwaiting = () => {
        buffering_state.value = true;
    }
    vel.onplaying = () => {
        playing_state.value = true;
    }
    vel.onpause = () => {
        playing_state.value = false
    }

    mouse_idle(vel, 1000, idle => {
        controls.style.opacity = idle ? "0" : "1"
        vel.style.cursor = idle ? "none" : "default"
    })

    vel.addEventListener("click", toggle_playing)
    pri.addEventListener("mousedown", ev => {
        const r = pri.getBoundingClientRect()
        const p = (ev.clientX - r.left) / (r.right - r.left)
        vel.currentTime = p * vel.duration
    })
    document.body.addEventListener("keydown", k => {
        if (k.code == "Period") vel["seekToNextFrame" as "play"]()
        else if (k.code == "Space") toggle_playing()
        else if (k.code == "ArrowLeft") vel.currentTime -= 5
        else if (k.code == "ArrowRight") vel.currentTime += 5
        else if (k.code == "ArrowUp") vel.currentTime -= 60
        else if (k.code == "ArrowDown") vel.currentTime += 60
        else return;
        k.preventDefault()
    })

    el.append(e("div", { class: "jsp" },
        vel,
        controls,
    ))
}

function mouse_idle(e: HTMLElement, timeout: number, cb: (b: boolean) => unknown) {
    let ct: number;
    let idle = false
    e.onmouseleave = () => { clearTimeout(ct) }
    e.onmousemove = () => {
        clearTimeout(ct)
        if (idle) {
            idle = false
            cb(idle)
        }
        ct = setTimeout(() => {
            idle = true
            cb(idle)
        }, timeout)
    }
}
function display_time(t: number): string {
    if (t < 0) return "-" + display_time(-t)
    let h = 0, m = 0, s = 0;
    while (t > 3600) t -= 3600, h++;
    while (t > 60) t -= 60, m++;
    while (t > 1) t -= 1, s++;
    return (h ? h + "h" : "") + (m ? m + "m" : "") + (s ? s + "s" : "")
}